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-   -   300td oil pressure/pump URGENT QUESTION! (http://www.peachparts.com/shopforum/tech-help/69827-300td-oil-pressure-pump-urgent-question.html)

vegdiesler 07-10-2003 11:11 PM

300td oil pressure/pump URGENT QUESTION!
 
Hi,
I wish I could have joined this forum under better circumstances, but I'm having a bit of a crisis with my '70 300td non-turbo. I've had low oil pressure, around zero at idle on in-dash PSI gauge, which jumps up a little unevenly and doesn't peg until 2000+ RPMS.

I decided to change the oil pump after changing the oil filter shaft o-rings with no change.

So I remove the old pump to find 12 or so ball bearings inside of the screen. There is also pieces of the cage which held the balls. They are about the size of the balls in a bicycle hub maybe 3-4 milimeter.

My questios are:

1) Where is the bearing from????

2) Will replacing the oil-pump possibly help? If not I can still cut my losses and return the pump.

I posted this on the diesel specific area of this site but do not know if some people are not actively watching that location. Any other advice is welcome. I am stuck in my shop as this is my daily car so please respond!

psfred 07-11-2003 12:03 AM

I suspect the bearings are from the vacuum pump, but don't know for sure (someone with a later model diesel than my 72 220D can help). In this case, you will have no vac, either.

I would replace the sending unit for the oil pressure gauge before replacing the pump, and verify that you do not have serious fuel dilution in the oil (it will smell of diesel if you do) before condeming the pump.

A new pump may help with oil pressure, but not if the main bearing are worn out.

Peter

mreid 07-11-2003 12:07 AM

YIKES!!!!. I cannot think of any bearing in the engine that is a ball bearing. Unless one of the oil pump bearings is like that. Can you tell from the cage how big in diameter the bearing might be? Possible front or rear crank bearing but I do not know their construction. It is not good though to find that in the oil screen. I would be parking it untill problem is diagnosed.


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